Block Caving and Associated Subsidence (modified after Tamrock block caving animation) Block cave mining is characterized by caving and extraction of a massive volume of ore which translates into a formation of major surface depression or subsidence zone directly above and in the vicinity of the mining operations.
eastern part of the mine (dark grey block) and its part blasted together with 5 pillars (light grey blocks) in October 2011 during preparatory works for the new mining system. 3. DEFORMATIONS IN SUBLEVEL CAVING MINING SYSTEM The sublevel caving mining system is used for steep, continuous mineral deposits. The ore is blasted
Underground Mining Methods and Applications Production Headframe Hans Hamrin* 1.1 INTRODUCTION Ore is an economic concept. It is defined as a concentration of ... recovery system. Post Room-and-Pillar Mining. Post room-and-pillar mining (or "post-pillar" mining) is a combination of room-and- pillar and cut-and-fill stoping. With this method ...
1.4 Contributions made by this thesis 3 II LONG TERM PLANNING IN A BLOCK CAVE MINE 5 II. 1 Introduction 5 ... Schematic representation of block cave mining system 7 Figure 2-3: Diagram of actual mine planning steps in block caving 8 ... Comparison between methods to compute mining reserves in Block Caving 50
Through the use of an integrated FEM/DEM-DFN modelling technique this thesis presents a new approach to simulation of block caving induced surface subsidence allowing physically realistic simulation of subsidence development from caving initiation to final subsidence deformation.
An Introduction to Block and Panel Caving. Allan Moss, General manager Rio Tinto Copper Projects Agenda Context – why the interest in caving How block caving works and key technical considerations Risks Value drivers 1 March 2011 BMO Capital Markets 2011 Global Metals & Mining Conference 2 Greater Depths of Mining 1 March 2011
2006, English, Thesis edition: A study of the block caving mining method and the technical parameters of a prospective block cave at Mount Keith operations [electronic resource] / Rohan I. Bridgland. Bridgland, Rohan I.
Block caving | Article about block caving by The Free ... Such extraordinary cost projections result from the favorable ore characteristics of the gold-bearing conglomerate that allow for extremely inexpensive, high-volume block caving mining techniques, and the cost-effective use of conveyors for ore delivery and waste impoundment.
Hudyma, M, Potvin, Y & Allison, D 2007b, ‘Seismic monitoring of the Northparkes lift 2 block cave—Part 2 production caving’, Proceedings of the 1st International Symposium on Block and Sublevel Caving, The Southern African Institute of Mining and Metallurgy, Johannesburg, pp. 335–354.
Figure 1.5 shows an informative classification of caving methods of mining. the term block caving will be used as a generic rather than as a specific term so that the discussion will usually apply to panel caving as well. • whether or not a crown pillar is left between mining lifts.3 and Chapter 5).
The block caving mining process limits access to the orebody, in turn limiting opportunities to gauge the state of the rock mass once the rock mass degradation and caving process has initiated. Poor knowledge of the evolving state of the rock mass
stoping, cut-and-fill, longwall mining, sublevel caving, and block caving. The second section describes underground mining equipment, with particular focus on excavation machinery such as boomheaders, coal cutters, continuous miners and shearers. 1. Underground Mining Methods 1.1. Classification of Underground Mining Methods
the ore recovered. Because of this, block caving can only be applied to the larger, more uniform deposits of the Gogebic Range. Small, irregular deposits must still be mined by conventional mining methods. The percentage of recovery of ore mined by block caving should be relatively high. In districts where this system is used, recoverys of
Block caving will most likely cause surface subsidence, and because the Pebble deposit is a sulfide deposit, the subsidence would result in generation of dangerous chemicals and their transport into the groundwater system.
thesis sistem block caving mining - addoor.biz. thesis sistem block caving mining, crusher gold roll. Block caving is an underground hard rock mining method that It is the underground version of open pit mining ...
Pretorius, D. (2006) The effect of dilution on the underground block cave ore reserves at Palabora Mining Company. The Southern African Institute of Mining and Metallurgy 1st International Symposium on Block and Sub-Level Caving, V&A Waterfront, Cape Town, South Africa, pp. 73–82.
Nowadays, Block Caving is the underground mining method with the highest productivity in the world. Many of the components of block caving have changed in the last few years, as new techniques and equipment have become available, increasing the efficiency of the method. Such
late Nineteenth Century (Brown, 2003). There are several different methods of cave mining, including block, panel, sublevel and inclined. This thesis focuses specifically on block/panel caving, in which an ore column of finite width, length and height is drawn from a horizontal array of drawpoints at its base.
46 BLOCK CAVING Keeping up with caving Caving mining techniques are experiencing a surge of interest, thanks to a combination of favourable metal prices, high forecast demand and the need to exploit deeper, more complex orebodies at the lowest cost possible. …
Abstract: In block caving, gravity flow plays a key role as it influences ore recovery and dilution. Recent research at the University of Chile has been directed towards expanding the understanding of gravity flow through experiments that could be included in gravity flow simulation tools.
A study of Isolated Draw Zones in Block Caving Mines by means of a large 3D Physical Model. International Journal of Rock Mechanics and Mining Sciences, vol 44, issue 6, pp. 860-870. 8. Castro R, Trueman, R. 2008. An experimental review of gravity flow for block and panel caving applications In Proceedings of Massmin2008, 9-11 of June, Lulea,
Block caving is an underground hard rock mining method that involves undermining an ore body, allowing it to progressively collapse under its own weight. It is the underground version of open pit mining. In block caving, a large section of rock is undercut, creating an artificial cavern that fills with its own rubble as it collapses.
Design and layout of sublevel caving, block caving, open stoping and blasthole stoping systems. Equipment selection, production scheduling, ventilation design, and mining costs. Prerequisites: MNGN314, MNGN516, or consent of Instructor. 2 hours lecture, 3 hours lab; 3 credit hours. Spring of odd years. MNGN520.
Block mining methods . Block caving is used to mine massive steeply dipping orebodies (typically low grade) with high friability. An undercut with haulage access is driven under the orebody, with "drawbells" excavated between the top of the haulage level and the bottom of the undercut. The drawbells serve as a place for caving rock to fall into.
block caving and primary crushing - iffdc.org.in. thesis sistem block caving mining, crusher gold roll. Block caving is an underground hard rock mining method that It is the underground version of open pit mining…
Block (gravity) caving is a bulk underground mining method, which allows large low-grade deposits to be mined underground. This method involves undermining the orebody to make it collapse under its own weight into a series of chambers from which the ore extracted.